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jbrefol

Car tuned afr then changed headers and exhaust after tuning

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Will it affect my Air fuel ratio ? My car was already tuned by my tuner when i was using a 4 1 header and 2.5" downpipe and exhaust. And changed it to 4 2 1 header same downpipe ang exhaust.  Im.using a link moonsoon ecu

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just log the car and see if is close to the AFR target or too way off. I'm guessing is a NA engine so the chances of kill the engine for a little change in the lambda is low, post a log on your new setup and tell us a little bit about what engine are we talking about.

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